CN103899318B - The milling of medium ground tunnel is dug and supporting machinery construction - Google Patents

The milling of medium ground tunnel is dug and supporting machinery construction Download PDF

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Publication number
CN103899318B
CN103899318B CN201410096886.4A CN201410096886A CN103899318B CN 103899318 B CN103899318 B CN 103899318B CN 201410096886 A CN201410096886 A CN 201410096886A CN 103899318 B CN103899318 B CN 103899318B
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China
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milling
portions
dug
predicament
tunnel
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CN201410096886.4A
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Chinese (zh)
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CN103899318A (en
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宋福
曹利
刘中勇
高陕北
张�雄
吴东鹏
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神华包神铁路有限责任公司
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Abstract

The invention discloses a kind of medium ground tunnel milling to dig and supporting machinery construction, comprise and parabolic shape is excavated into the large quartering hammer of core of topping bar, to part milling digging machine excavation outside the center of topping bar, after being trimmed to the excavation face perpendicular to tunnel axis, supporting is carried out to topping bar, form stable Load-carring arch, then the large quartering hammer of centering step Core Soil part is excavated to the drift of large crushing hammar drill rod, centering step is left, right side side wall portions milling digging machine excavates, deburring, and preliminary bracing, then the large quartering hammer of Core Soil part of getting out of a predicament or an embarrassing situation is excavated, to a left side of getting out of a predicament or an embarrassing situation, right side side wall portions milling digging machine excavates, deburring, and preliminary bracing, then slag tap, repeat above-mentioned steps, until whole tunnel excavation terminates.The present invention has given full play to the advantage of milling digging machine supporting machineryization construction, and achieve the precise forming of tunnel contour, country rock disturbance is little, and out break controls good, operating environment and working security high, avoid the impact that concussion of blasting brings.

Description

The milling of medium ground tunnel is dug and supporting machinery construction

Technical field

The present invention relates to a kind of medium ground tunnel milling to dig and supporting machinery construction, belong to constructing tunnel working skill field.

Background technology

Current tunnel excavation construction is main according to New Austrian Tunneling Method principle, and excavation method is divided into drilling and blasting method and non-drilling and blasting method two kinds.Along with the expansion rapidly of tunneling scope, its can closely pass through unavoidably existing road, tunnel and under wear all kinds of structure, if blasting vibration control is improper during drill bursting construction, can cause that the distortion of surface buildings is excessive, vibration limits, even cave in; Meanwhile, along with the raising of social safety consciousness, the use restriction of engineering field priming system will be progressively strict, and these just require to adopt non-blasting procedure strictly to control distortion that constructing tunnel causes and vibrations, complete construction.Non-drilling and blasting method comprises full face rock tunnel boring machine, single boom roadheader method and milling and digs method.Facts have proved, when length of tunnel and diameter ratio are greater than 600, when namely length of tunnel is greater than 3.6km, it is both economical that employing full face rock tunnel boring machine carries out constructing tunnel.Single boom roadheader be a set ofly integrate excavation, slag tap, the system of spray for dust suppression, and be driven by power, therefore in power drive and in construction flexibility, there is certain limitation, and price be more expensive.Relative to full face rock tunnel boring machine and single boom roadheader method, milling digging machine then embodies flexible, economic feature.Milling digging machine excavates efficiency in weak broken stratum can reach 25-40m 3/ h, but to intensity comparatively large or integrality preferably in ground consisting of hard rock, milling is dug efficiency and is sharply declined, and independent milling excavation construction will affect efficiency of construction.

Summary of the invention

The object of the invention is to be: provide a kind of medium ground tunnel milling and dig and supporting machinery construction, solving that the blast disturbance that causes medium ground tunnel cannot adopt blast working or country rock bigger than normal for rock mass strength, integrality is good construction during when constructing is large, serious, the earth's surface of backbreaking is out of shape serious technical barrier.

Technical scheme of the present invention: in order to solve the problems of the technologies described above, the present invention is achieved through the following technical solutions: a kind of medium ground tunnel milling is dug and supporting machinery construction, according to three benching tunnelling methods, medium ground tunnel cross section is divided into core of topping bar, side wall portions, right side side wall portions, Core Soil part of getting out of a predicament or an embarrassing situation, get out of a predicament or an embarrassing situation left side side wall portions and right side side wall portions on the left of part, middle step Core Soil part, middle step outside center of topping bar, the construction for each portion is carried out as follows:

A, large quartering hammer is adopted to excavate into half parabolic shape to core of topping bar;

The parabolic shape excavation facing cut that outside B, center of topping bar, part adopts milling digging machine to be formed by core of topping bar digs, be trimmed to plane perpendicular to tunnel axis;

C, top bar and excavated after, carrying out preliminary bracing to topping bar, being formed and stablizing Load-carring arch;

D, centering step Core Soil part adopt large quartering hammer to be excavated to the drift of large crushing hammar drill rod;

On the left of E, centering step, side wall portions, right side side wall portions adopt milling digging machine excavation, deburring, and perform preliminary bracing;

F, large quartering hammer is adopted to be excavated to the drift of large crushing hammar drill rod to Core Soil part of getting out of a predicament or an embarrassing situation;

G, left side side wall portions of getting out of a predicament or an embarrassing situation, right side side wall portions are adopted to milling digging machine excavation, deburring, and perform preliminary bracing, then adopt self-tipping type drag-out slag car to slag tap;

H, repetition A ~ G step, until whole tunnel excavation terminates.

Above-mentioned medium ground tunnel milling is dug and supporting machinery construction, when in described step e, on the left of centering step, on the right side of side wall portions, middle step, operation is dug in the milling of abutment wall partial continuous, keep longitudinal 2 ~ 3 Pin that stagger of left and right side wall portions, apply after preliminary bracing until side, then carried out the milling of opposite side abutment wall and dig and apply preliminary bracing.

Above-mentioned medium ground tunnel milling is dug and supporting machinery construction, when operation being dug to left side side wall portions of getting out of a predicament or an embarrassing situation, right side abutment wall partial continuous milling of getting out of a predicament or an embarrassing situation in described step G, keep longitudinal 2 ~ 3 Pin that stagger of left and right side wall portions, apply after preliminary bracing until side, then carried out the milling of opposite side abutment wall and dig and apply preliminary bracing.

Above-mentioned medium ground tunnel milling is dug and supporting machinery construction, when adopting large quartering hammer excavation in described steps A to topping bar, carries out step e or G milling digging machine carries out abutment wall excavation and finishing simultaneously.

Above-mentioned medium ground tunnel milling is dug and supporting machinery construction, in described step B to top bar with carry out milling excavate time, carry out the large quartering hammer of step D or F simultaneously and carry out Core Soil excavation.

Beneficial effect of the present invention: compared with existing constructing tunnel engineering method, medium ground tunnel milling digging machine supporting machinery construction of the present invention, developed by soft stratum tunnel milling excavation construction engineering method, strictly follow the New Austrian Tunneling Method construction principle of " section excavation, fast supporting, diligently to measure, tightly to close, precocity ring, steadyly to seek quickness ", select three benching tunnelling methods or benching tunneling method to construct according to different geological conditions.

The invention has the advantages that:

1, this engineering method is applicable to wear under hard intensity country rock body big cross section in III, IV, V grade of joints development the highway tunnel in existing line, goaf etc., railway tunnel and Nearby Structure and requires the underground tunnel project such as higher municipal administration to damping.

2, this engineering method has given full play to the advantage that method is dug in mechanical milling, and achieve the precise forming of tunnel contour, country rock disturbance is little, and out break control effects is good, operating environment and working security high, reduce out break, protect country rock, avoid large deformation and local collapse.

3, to dig or when broken excavation carrying out milling to topping bar, can carry out the excavation of getting out of a predicament or an embarrassing situation and preliminary bracing, operating efficiency improves, and accelerates programming, shortens the whole engineering time, reduce cost of production simultaneously.

4, this engineering method avoids the impact of blasting impact power on periphery rock mass, reduces rock convergence measure, can reduce surrounding rock supporting grade, saves support cost.

Accompanying drawing explanation

Fig. 1 is construction tunnel schematic cross-sectional view of the present invention;

Fig. 2 is construction tunnel longitudinal sectional view of the present invention;

Fig. 3 is construction tunnel vertical view cutaway drawing of the present invention.

Reference numeral: 1-tops bar core, 2-tops bar part outside center, step Core Soil part in 3-, side wall portions on the left of step in 4-, side wall portions on the right side of step in 5-, 6-gets out of a predicament or an embarrassing situation Core Soil part, and 7-gets out of a predicament or an embarrassing situation left side side wall portions, side wall portions on the right side of 8-gets out of a predicament or an embarrassing situation, 9-inverted arch part.

Detailed description of the invention

Below in conjunction with accompanying drawing and instantiation, the present invention is described in further detail: a kind of medium ground tunnel milling is dug and supporting machinery construction, according to three benching tunnelling methods, medium ground tunnel cross section is divided into as accompanying drawing 1, several part shown in accompanying drawing 2 and accompanying drawing 3, to top bar core 1, to top bar part 2 outside center, middle step Core Soil part 3, side wall portions 4 on the left of middle step, side wall portions 5 on the right side of middle step, to get out of a predicament or an embarrassing situation Core Soil part 6, side wall portions 7 and right side side wall portions 8 of getting out of a predicament or an embarrassing situation on the left of getting out of a predicament or an embarrassing situation, construction for each portion is carried out as follows:

A, adopt bucket mountain DXB160 type large quartering hammer to be excavated to drill steel drift to core 1 of topping bar, make driving face become half paraboloid shape; Cyclic advance 1.2m ~ 2.4m (1 ~ 2 Pin bow member) is excavated each time according to different surrounding rock rank.

The parabolic shape excavation facing cut that outside B, center of topping bar, part 2 adopts German Ai Kate ER1500 model milling digging machine to be formed by core of topping bar digs, is trimmed to plane perpendicular to tunnel axis, forklift for slag repairs out horizontal plane, provides platform for performing preliminary bracing; Consider the operation of milling digging machine, excavation height of topping bar is preferably 2.5 ~ 3 meters.

C, top bar and excavated after, carry out first pneumatically placed concrete in time, frame founds bracing members, anchor net applies system supporting, erection i-beam frame, and ensure steel arch-shelf and country rock closely connected, and be sprayed onto design thickness again, form stable Load-carring arch, when arch springing Lack of support, applying of each branch's lock foot anchoring stock or anchor tube to be strengthened especially, formed and stablize Load-carring arch;

D, centering step Core Soil part 3 adopt large quartering hammer to be excavated to the drift of large crushing hammar drill rod; Middle bench excavation height is preferably 2 ~ 2.5 meters.

On the left of E, centering step, side wall portions 4, right side side wall portions 5 adopt milling digging machine excavation, deburring, milling connects leg (in type rigid arch frame step part spreading) in time, closes in time after digging deburring, pendulous tank is no more than 2 couch bow members, in construction, make same section part expose excavation face and be only limitted to side.

F, large quartering hammer is adopted to be excavated to the drift of large crushing hammar drill rod to Core Soil part 6 of getting out of a predicament or an embarrassing situation; Excavation height of getting out of a predicament or an embarrassing situation is preferably about 2 ~ 2.5 meters.

G, get out of a predicament or an embarrassing situation left side side wall portions 7, right side side wall portions 8 adopted to milling digging machine excavates, deburring, and perform preliminary bracing, then adopt self-tipping type drag-out slag car to slag tap;

H, repetition A ~ G step, until whole tunnel excavation terminates.

When in above-mentioned steps E, on the left of centering step, on the right side of side wall portions, middle step, operation is dug in the milling of abutment wall partial continuous, keep longitudinal 2 ~ 3 Pin that stagger of left and right side wall portions, until side performed just pneumatically placed concrete, frame founds bracing members, anchor net performs, after multiple pneumatically placed concrete operation, then carry out opposite side abutment wall milling cutout groove and apply preliminary bracing.If both sides type steel support is in vacant state simultaneously, tunnel vault is easily caused to subside, unsettled after staggering, have and be also in holding state on one side.

When operation being dug to left side side wall portions of getting out of a predicament or an embarrassing situation, right side abutment wall partial continuous milling of getting out of a predicament or an embarrassing situation in step G, keep left and right side wall portions longitudinally to stagger 2 ~ 3 Pin, applied after preliminary bracing until side, then carry out the milling of opposite side abutment wall and dig and apply preliminary bracing.

In this manual, three step construction engineering methods can be adjusted to upper and lower two steps for different geological conditions, are 5 ~ 10 meters by upper and lower two step step spacing.

Simultaneously in order to accelerating construction progress, when implementation step A adopts large quartering hammer excavation to topping bar, carry out step e or G milling digging machine carries out abutment wall excavation and finishing simultaneously.In implementation step B, carrying out milling to topping bar when excavating, carrying out the large quartering hammer of step D or F simultaneously and carrying out Core Soil excavation.

And inverted arch part 9 should be excavated after having slagged tap at once, perform inverted arch, make it close into ring as early as possible, make structure stress more reasonable.Excavate once for closing into ring 5 ~ 10m as early as possible, inverted arch shop fixtures adopts hand fit's galianconism excavator to pick up the end, picks up bottom and is furnished with beam-and-rail, fly-switching equipment, decreases construction interference.Excavate bracing members and the colligation simultaneously of inverted arch reinforcing bar of rear installation preliminary bracing, pour concrete, until concrete final set backfill after solid a day, then forward impelling construction.

All features disclosed in this manual, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.

Claims (6)

1. a medium ground tunnel milling is dug and supporting machinery construction, it is characterized in that, three benching tunnelling methods are adopted to construct, medium ground tunnel cross section to be divided into outside core of topping bar (1), center of topping bar on the left of part (2), middle step Core Soil part (3), middle step side wall portions (5), Core Soil part of getting out of a predicament or an embarrassing situation (6), get out of a predicament or an embarrassing situation left side side wall portions (7) and right side side wall portions (8) of getting out of a predicament or an embarrassing situation on the right side of side wall portions (4), middle step by three benching tunnelling methods, and the construction for each portion is carried out as follows:
A, large quartering hammer is adopted to excavate into parabolic shape to core of topping bar (1);
Outside B, center of topping bar, part (2) adopts milling digging machine to be dug by the parabolic facing cut that core of topping bar (1) is formed, is trimmed to plane perpendicular to tunnel axis;
C, top bar and excavated after, carrying out preliminary bracing to topping bar, forming stable Load-carring arch;
D, centering step Core Soil part (3) adopt large quartering hammer to be excavated to the drift of large crushing hammar drill rod;
On the left of E, centering step, on the right side of side wall portions (4), middle step, side wall portions (5) adopts that milling digging machine excavates in conjunction with little quartering hammer, deburring, and performs preliminary bracing;
F, large quartering hammer is adopted to be excavated to the drift of large crushing hammar drill rod to Core Soil part (6) of getting out of a predicament or an embarrassing situation;
G, left side side wall portions (7) of getting out of a predicament or an embarrassing situation, right side side wall portions (8) of getting out of a predicament or an embarrassing situation adopted to milling digging machine excavate in conjunction with little quartering hammer, deburring, and perform preliminary bracing, then employing self-tipping type drag-out slag car is slagged tap;
H, repetition A ~ G step, until whole tunnel excavation terminates.
2. medium ground tunnel milling according to claim 1 is dug and supporting machinery construction, it is characterized in that: when in described step e, on the left of centering step, on the right side of side wall portions (4), middle step, operation is dug in the continuous milling of side wall portions (5), keep longitudinal 2 ~ 3 Pin that stagger of left and right side wall portions, apply after preliminary bracing until side, then carried out the milling of opposite side abutment wall and dig and apply preliminary bracing.
3. medium ground tunnel milling according to claim 1 is dug and supporting machinery construction, it is characterized in that: when in described step G, to left side side wall portions (7) of getting out of a predicament or an embarrassing situation, right side side wall portions (8) of getting out of a predicament or an embarrassing situation, operation is dug in milling continuously, keep longitudinal 2 ~ 3 Pin that stagger of left and right side wall portions, apply after preliminary bracing until side, then carried out the milling of opposite side abutment wall and dig and apply preliminary bracing.
4. medium ground tunnel milling according to claim 1 is dug and supporting machinery construction, it is characterized in that: when adopting large quartering hammer excavation in described steps A to topping bar, and carries out step e or G milling digging machine carries out abutment wall excavation and finishing simultaneously.
5. medium ground tunnel milling according to claim 1 is dug and supporting machinery construction, it is characterized in that: carrying out milling in described step B to topping bar when excavating, carrying out the large quartering hammer of step D or F simultaneously and carrying out Core Soil excavation.
6. medium ground tunnel milling according to claim 1 is dug and supporting machinery construction, it is characterized in that, adopts upper and lower two step construction methods, is 5 ~ 10 meters by upper and lower two step spacing.
CN201410096886.4A 2014-03-17 2014-03-17 The milling of medium ground tunnel is dug and supporting machinery construction CN103899318B (en)

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CN107246275A (en) * 2017-07-21 2017-10-13 中国神华能源股份有限公司 For the support frame of digging laneway, supporting construction and tunnelling method
CN107327306B (en) * 2017-08-21 2019-12-31 中铁十一局集团第五工程有限公司 Construction method for excavating superposed tunnels under urban shallow-buried condition
CN107842368B (en) * 2017-10-30 2019-03-15 重庆城建控股(集团)有限责任公司 City tunnel Drilling mills the non-quick-fried excavation technology of mechanical combination
CN108204236A (en) * 2017-12-29 2018-06-26 中铁五局集团有限公司 Pre -arranged layer tunnel piecemeal synchronous construction full face tunneling method
CN109854254A (en) * 2019-04-11 2019-06-07 中铁八局集团第三工程有限公司 A kind of neighbouring high-speed rail two-wire large cross-section tunnel cantilever excavator construction technology
CN110344846A (en) * 2019-05-23 2019-10-18 中铁隧道集团四处有限公司 A three step remaining core soil in advance band excavation methods of inverted arch

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CN101725358A (en) * 2008-10-31 2010-06-09 中铁四局集团有限公司 Excavation construction method of ultra-shallow buried uneven weathered stratum of tunnel
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